C

Cinnamaldehyde

IUPAC: (E)-3-phenylprop-2-enal

C9H8O Organic Compounds CAS 104-55-2
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Quick Reference
Formula / NotationC9H8O
CAS Number104-55-2
Molecular Weight132.16
Melting Point-7.5 °C
Boiling Point253 °C @ 760 MM HG (SLIGHT DECOMP)
Density1.048-1.052 at 25 °C/25 °C
SolubilityDissolves in about 700 parts water, in about 7 volumes of 60% alcohol.
AppearanceLiquid, Other Solid; Liquid
Also Known As(E)-3-phenylprop-2-enal; 104-55-2; Cinnamal; Zimtaldehyde; 3-Phenylacrylaldehyde; 2-Propenal, 3-phenyl-; 3-Phenylpropenal; Phenylacrolein; 3-Phenyl-2-propenal; Cassia aldehyde
CategoryOrganic Compounds

What is Cinnamaldehyde?

(E)-cinnamaldehyde is the E (trans) stereoisomer of cinnamaldehyde, the parent of the class of cinnamaldehydes. It has a role as a sensitiser, a hypoglycemic agent, a flavouring agent, a vasodilator agent, an antifungal agent, an EC 4.3.1.24 (phenylalanine ammonia-lyase) inhibitor and a plant metabolite. It is a 3-phenylprop-2-enal and a member of cinnamaldehydes.

Formula & Notation

C9H8O

IUPAC Name: (E)-3-phenylprop-2-enal

Other Names / Synonyms: (E)-3-phenylprop-2-enal; 104-55-2; Cinnamal; Zimtaldehyde; 3-Phenylacrylaldehyde; 2-Propenal, 3-phenyl-; 3-Phenylpropenal; Phenylacrolein; 3-Phenyl-2-propenal; Cassia aldehyde

Properties & Characteristics

Appearance: Liquid, Other Solid; Liquid. Molecular formula: C9H8O. Molecular weight: 132.16 g/mol. Boiling point: 253 °C @ 760 MM HG (SLIGHT DECOMP). Melting point: -7.5 °C. Density: 1.048-1.052 at 25 °C/25 °C. Solubility: Dissolves in about 700 parts water, in about 7 volumes of 60% alcohol.. Vapor pressure: 2.89X10-2 mm Hg at 25 °C. LogP: 1.9.

Physical Data

PropertyValue
Melting Point-7.5 °C
Boiling Point253 °C @ 760 MM HG (SLIGHT DECOMP)
Density1.048-1.052 at 25 °C/25 °C
Molecular Weight132.16
SolubilityDissolves in about 700 parts water, in about 7 volumes of 60% alcohol.
AppearanceLiquid, Other Solid; Liquid

Uses & Applications

Used as an industrial feedstock, solvent, pharmaceutical intermediate, flavoring agent, or chemical building block.

Safety Information

Flammable or irritant. Many organic compounds are flammable liquids or vapours. Keep away from ignition sources. Consult SDS for specific hazard data.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Cinnamaldehyde
Formula C9H8O
CAS Number 104-55-2
Molecular Weight 132.16
Synonyms (E)-3-phenylprop-2-enal; 104-55-2; Cinnamal; Zimtaldehyde; 3-Phenylacrylaldehyde; 2-Propenal, 3-phenyl-; 3-Phenylpropenal; Phenylacrolein; 3-Phenyl-2-propenal; Cassia aldehyde

Frequently Asked Questions

(E)-cinnamaldehyde is the E (trans) stereoisomer of cinnamaldehyde, the parent of the class of cinnamaldehydes. It has a role as a sensitiser, a hypoglycemic agent, a flavouring agent, a vasodilator agent, an antifungal agent, an EC 4.3.1.24 (phenylalanine ammonia-lyase) inhibitor and a plant metabolite. It is a 3-phenylprop-2-enal and a member of cinnamaldehydes.

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Editorial standards: Chemical data is sourced from peer-reviewed literature, CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA, and IAEA. For educational purposes only — always consult official SDS documentation and qualified professionals before handling chemicals.